Cranking out of boat

Chad Carter

Recruit
Joined
Jan 16, 2025
Messages
1
On a 89 Mercury 25 hp I need to crank it in my garage before I buy it what wires do I need and how
 

cyclops222

Lieutenant Commander
Joined
Mar 21, 2024
Messages
1,970
Automotive clip on Jumper Cables. Heavy duty one with Red and Black colors. and a fully charged up small car battery.
Black clamps go to battery -MINUS POST and unpainted thick metal part of the motor or exhaust system. NOTHING that has a ball bearing in it.
Red clamp goes onto the LARGE wire post on the starter motor. PUT that red clamp on FIRST !!!! Lastly put the other red clamp onto the + POSITIVE POST of the battery. Safer that way if you slip on a connection.
Do not crank for more than 30 seconds at a time. Post why you need to do the cranking ??
 
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